US2716588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparation of metal salts
Assignee: Individual
•
Filing: 1954-10-08
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Granted: 1955-08-30
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Expires: 1974-10-08
Abstract
No abstract record available.
Inventors
- 👤 James D Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:57
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/32; C22B7/00; C22B7/006; C22B7/007; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF RAPIDLY AND ECONOMICALLY CONVERTING A CORROSION RESISTANT ALLOY OF AT LEAST ONE METAL ABOVE AND AT LEAST ONE METAL BELOW HYDROGEN IN THE ELECTROMOTIVE FORCE SERIES INTO METAL COMPOUNDS WHICH COMPRISES THE STEPS OF INTRODUCING A CORROSION RESISTANT ALLOY CONTAINING SAID METALS INTO AN AQUEOUS SOLUTION CONTAINING IN EXCESS OF ABOUT 0.5% BY WEIGHT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC ACID, ACETIC ACID, SULPHURIC ACID, HYDROFLUORIC ACID, NITRIC ACID, HYDROCHLORIC ACID, PHOSPHORIC ACID, AND PASSING SULPHUR DIOXIDE INTO THE SOLUTION, WHEREBY THE INSOLUBLE SULPHIDES ARE PRECIPITATED AND THE SOLUBLE SALTS OF THE ACID SELECTED ARE RETAINED IN THE SOLUTION.
Claim 2
Independent Claim
106 words
THE METHOD OF RAPIDLY AND ECONOMICALLY CONVERTING A CORROSION RESISTANT ALLOY OF AT LEAST ONE METAL ABOVE AND AT LEAST ONE METAL BELOW HYDROGEN IN THE ELECTROMOTIVE FORCE SERIES INTO METAL COMPOUNDS WHICH COMPRISES THE STEPS OF INTRODUCING A CORROSION RESISTANT ALLOY CONTAINING SAID METALS INTO AN AQUEOUS SOLUTION CONTAINING IN EXCESS OF ABOUT 0.5% BY WEIGHT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC ACID, ACETIC ACID, SULPHURIC ACID, HYDROFLUORIC ACID, NITRIC ACID, HYDROCHLORIC ACID, PHOSPHORIC ACID, AND PASSING SULPHUR DIOXIDE INTO THE SOLUTION, WHEREBY THE INSOLUBLE SULPHIDES ARE PRECIPITATED AND THE SOLUBLE SALTS OF THE ACID SELECTED ARE RETAINED IN THE SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |